Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 16 of 16 for “"Active set"”.
-
Solutions of Inequality Constrained Spline Optimization Problems with the Active Set Method
… of this type. In particular, we develop the active set method and use it to solve these problems, emphasizing the fact that this algorithm will converge to a solution in finite iterations. Our solution will solve an open problem regarding near-interpolant spline curves. Furthermore, we …
-
An active-constraint logic for nonlinear programming
The choice of active-constraint logic for screening inequalities has a major impact on the performance of gradient-projection method. It has been found that least-constrained strategies, which keep the number of constraints in the active set as small as possible, are computationally most efficient. …
-
Shape Calculus Applied to State-Constrained Elliptic Optimal Control Problems
… which is regarded as an equation inside the active set, is differentiated in order to obtain a control law. A geometrical splitting of the constraints is necessary to carry over this approach to the chosen model problem. The associated assertions are rigorously ensured. The subsequent …
-
Model predictive control of wheeled mobile robots
… tracking. This research applies a non-feasible active set MPC algorithm developed in [1] which is faster than the traditional active set methods (ASMs). A discrete-time linear model of a general WMR is used for the simulation. MATLAB simulations are performed for tracking circular as well as …
-
Resource management for wireless networks of bearings-only sensors
… not degrade very much when only a few nodes are active to maximize the effective tracking lifetime. For scheduling to prolong the tracking lifetime, a new energy-based (EB) metric is proposed to model the number of snapshots remaining for a hypothesized node set, i.e., the remaining battery …
-
New Techniques for Multicarrier Communication Systems
… that lowers the PAR of a transmit OFDM block. Active-set methods provide a fast-converging PAR reduction technique that can be applied to real- and complex-baseband OFDM systems. In systems where data tones cannot be sacrificed, PAR reduction can be obtained using active (data-carrying) …
-
Forward and inverse American option pricing via a complementarity approach
… algorithms---a PSOR method, a two phase active-set method, a semi-smooth Newton method and a pivoting method---for solving LCPs that arise under Kou's jump diffusion model and the Dupire system. The numerical results presented in the thesis summarize the effectiveness of each approach for …
-
Tracing parametrized optima for inequality constrained nonlinear minimization problems
… developed in this research. The algorithm is an active set algorithm using a homotopy method to trace the path. A new feature of the algorithm is a capability of handling the transition points between segments in a routine way. The algorithm locates the transition points, and finds an active set …
-
Model-Based Vehicle Dynamics Control for Active Safety
… increasingly dependent on control systems. Active safety is an area in which control systems play a pivotal role. Currently, rule-based control algorithms are widespread throughout the automotive industry. In order to improve performance and reduce development time, model-based methods may …
-
A Comparison of Control Methods for Spacecraft Maneuvering With Run Time Assurance
… states will remain within a predefined safe set of values, no matter the potentially dangerous control actions from the primary controller. This research compares control approaches for a deputy spacecraft conducting proximity operations to safely egress from near a chief spacecraft to a …
-
A Comparison of Control Methods for Spacecraft Maneuvering With Run Time Assurance
… states will remain within a predefined safe set of values, no matter the potentially dangerous control actions from the primary controller. This research compares control approaches for a deputy spacecraft conducting proximity operations to safely egress from near a chief spacecraft to a …
-
Optimization Methods for Machine Learning under Structural Constraints
… based on proximal gradient descent and active set methods, and derive novel linear convergence guarantees for our proposed algorithms. Empirically, our framework can approximately solve instances with n=100,000 and d=10 within minutes. In the second chapter, we develop a new …
-
Numerical approaches to optimize dispatch on microgrids with energy storage
… dispatch, four optimization methods including active-set, interior-point method, sequential quadratic programming (SQP) and trust-region-reflective are discussed and compared to find the relatively fast and robust optimization algorithm. The computation was implemented by using the MATLAB …
-
Exterior Penalty Approaches for Solving Linear Programming Problems
… programming problems. These methods are an active set l2 penalty approach (ASL2), an inequality-equality based l2 penalty approach (IEL2), and an augmented Lagrangian approach (ALAG). Particular effective variants are presented for each method, along with comments and experience on …
-
A strictly feasible sequential convex programming method
… search procedure is introduced. Moreover, an active set strategy is applied to reduce computation time. The iterates of SCP are not guaranteed to be inside the corresponding feasible region described by the constraints. As a consequence it is not able to solve free material optimization …